spectrograph

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spec·tro·graph

(spek'trō-graf),
An instrument used to display or record spectra, as from electromagnetic or sound waves.

spectrograph

(spĕk′trō-grăf) [″ + Gr. graphein, to write]
An instrument designed to photograph spectra on a sensitive photographical plate.

mass spectrograph

A device that separates ions of different masses by employing a magnetic field to deflect them as they travel along a given path.
References in periodicals archive ?
The oil sample was analyzed spectrographically, the different kinds of metal particles were identified, and the density of each amount of particulate determined.
After passing atmospherically derived "nitrogen" over hot magnesium to absorb all the nitrogen, Ramsey spectrographically identified the remaining gas--roughly 1 percent of the original volume--as a new element.
Of particular interest is that between skins in some sites are thin layers of haematite and other iron minerals, which spectrographically have been shown to be exotic to the sites themselves.